when it came to the serious business of picking favorites for 2016, it was filibustering senator rand paul who won the straw poll by taking on the party establishment. >> the gop of old has grown stale and moss-covered. >> reporter: a cornerstone of that gop establishment, speaker john boehner, told me in an exclusive interview, on "this week," his party needs to better brand its message. >> republicans have not done as effective a job as we should in terms of talk iing about our principles. >> reporter: and boehner said that while the president's two-week charm offensive has been working hard. not much has happened. >> martha raddatz in washington, thank you for that. >>> now, to more bad headlines for carnival cruise lines. there has been yet another serious malfunction on one of their ships. so, if you're counting at home, that's now four carnival cruise ships in trouble in the last month. to the degree that u.s. senator chuck schumer is proposing a cruise passenger's bill of rights. and abc's gio benitez has the story. >> reporter: this morning, the carnival "legend" is back at sea and